virtio.h: add apis virtio_read/write_config_member

Used to read/write the virtio deivces' configuration space member Signed-off-by: Bowen Wang <wangbowen6@xiaomi.com>
OpenAMP · Oct 8, 2024 · 0d9c1ce · 0d9c1ce
1 parent 0cdd00d
commit 0d9c1ce
Showing 1 changed file with 15 additions and 0 deletions.
diff --git a/lib/include/openamp/virtio.h b/lib/include/openamp/virtio.h
@@ -138,6 +138,21 @@ struct virtio_device_id {
 #define VIRTIO_TRANSPORT_F_START 28
 #define VIRTIO_TRANSPORT_F_END 32
 
+/*
+ * Read the virtio device configuration member.
+ */
+#define virtio_read_config_member(vdev, structname, member, ptr) do { \
+ virtio_read_config((vdev), metal_offset_of(structname, member), \
+ (ptr), sizeof(*(ptr))); \
+ } while (0)
+/*
+ * Write the virtio device configuration member.
+ */
+#define virtio_write_config_member(vdev, structname, member, ptr) do { \
+ virtio_write_config((vdev), metal_offset_of(structname, member), \
+ (ptr), sizeof(*(ptr))); \
+ } while (0)
+
 #ifdef VIRTIO_DEBUG
 #include <metal/log.h>